I've had a De'Longhi ECP3420 for a few years and in the recent weeks it's started to develop a pressure problem. The espresso will pour for a few seconds and then starts to let out a drop at a time. I can audibly hear it struggling. I don't mind trying to buy the necessary parts to try repairing it myself. It is a relatively cheap machine, so does it make sense to put money into repairs or just upgrade and buy a new machine.